Black Basalt Cobbles · Lava Stone
Cooled lava, cut square.
A natural black stone formed from the cooled lava of volcanoes — durable, uniquely textured, and richly black. Quarried in Kota and processed in our own units.
Black Basalt Cobbles · Lava Stone
A natural black stone formed from the cooled lava of volcanoes — durable, uniquely textured, and richly black. Quarried in Kota and processed in our own units.
Black basalt stone cobbles are top and bottom split cobbles with machine-cut edges and a shiny black colour. These are real installations, not staged shots.
About the Stone
Black Basalt Cobbles are a natural black stone that has been formed from the cooled lava of volcanoes. It is a popular choice for construction projects due to its durability, unique texture, and rich black colour. Basalt cobbles are often referred to as lava cobble stone, and are widely used in architecture, landscaping and interior design as well as outdoors.
The Malujiwala Stone Company is a leading supplier of black basalt slabs and Black Basalt Cobbles in India. We have been in the business for over 35 years and have earned a reputation for providing high-quality natural stone products. Our basalt stones are sourced from the Kota District in Rajasthan, India, where they are quarried and processed using state-of-the-art technologies.
Basalt is an igneous rock rather than a sedimentary one, and that changes its behaviour: it is dense, extremely hard-wearing, and handles heavy traffic in a way softer stones cannot. That makes basalt cobbles the specification of choice for high-traffic areas — driveways, commercial forecourts and public realm work — where the surface has to survive decades of vehicles rather than footfall alone.
Standard sizes 4×4×4, 4×4×3, 4×4×2 inches — and can be customised. Customised finishes produced on order.
Cobbles live or die on the base beneath them. A few honest notes that will save you real trouble later.
The base is everything. Cobbles are rigid units — unlike gravel or block paving they cannot shift and settle gracefully. Once a cobble surface sinks or heaves, the whole thing looks wrong and the only real fix is lifting it and starting again. For a footpath, excavate to roughly 200mm and lay 100mm of compacted MOT Type 1. For a driveway, excavate 250–300mm and lay a minimum 200mm sub-base — 250mm on clay soil. Compact in layers of no more than 100mm at a time.
Dark stone shows cement haze. Any mortar smear or efflorescence reads far more starkly against black basalt than against a buff sandstone. Keep the face swept clean as you point, keep the pointing mix on the dry side of workable, and consider a resin-based jointing compound — it leaves the face totally clean and is the safest option on a dark stone.
Full mortar bed — never spot-bed a driveway. Every cobble must sit on a full semi-dry mortar bed of 30–40mm, mixed around 4:1 sharp sand to cement. Spot-bedding on five dabs is the single most common cause of failed cobble driveways in the UK. Set each unit by hand and tap down with a rubber mallet.
Leave a finger-width joint. Natural split cobbles vary in size by their nature — they are not sawn to identical dimensions like concrete block paving. Trying to butt them tight is next to impossible and looks worse, not better. A finger-width joint (roughly 8–10mm on a driveway, 5–8mm on a border) is the trade guide. Stagger the perpendicular joints.
Point them properly. A brush-in resin jointing compound gives the most durable, weed-resistant result and leaves the stone face clean. Traditional sand-cement pointing is cheaper in materials but far slower, and if the mix is too wet it will stain the stone permanently. Whichever you choose, keep the surface swept clean as you go.
Order 10% extra. Standard for any natural stone — covers cuts, breakage and future repairs. Keep the offcuts.
Dense and igneous — built for heavy traffic and commercial spaces.
Deep black framing lighter paving — the highest-contrast border there is.
Widely used in architecture and interior design as well as outdoors.
Streetscapes and forecourts that must survive decades of use.
Care & Maintenance
Once laid and cured, Black Basalt Cobbles need almost nothing from you. An annual jet wash keeps them looking fresh — but keep the pressure low, under about 1500 PSI, or you will blast the jointing straight out and create the very problem you were trying to avoid.
Sweep with a soft broom and wash with a mild, pH-neutral detergent. Spot-clean spills rather than letting them sit. Avoid acidic cleaners: they can etch natural stone, and on limestone-based cobbles the damage is permanent. If a joint washes out over the years, top it up rather than leaving it — open joints let water under the bed and that is how movement starts.
Basalt is an igneous rock formed from cooled volcanic lava, where sandstone is sedimentary — formed from compressed sand over millions of years. Basalt is denser and harder-wearing, which is why it handles heavy traffic better. It is often called lava cobble stone for that reason.
Five as standard: basalt hand cut, basalt flamed, basalt shotblasted, basalt machine cut and basalt leather finish cobbles. Customised finishes are produced on order.
Standard sizes are 4x4x4, 4x4x3 and 4x4x2 inches, and they can be customised to your specification.
Yes — they are among the best options for it. Basalt cobbles are durable and can handle heavy traffic, making them suitable for high-traffic areas like driveways and commercial spaces. Lay on a minimum 200mm compacted sub-base with a full mortar bed.
The Kota District in Rajasthan, India, where it is quarried and processed using state-of-the-art technologies. We have been supplying black basalt for over 35 years.
Basalt holds its colour well — the black is the mineral composition of the rock, not a surface treatment. As with any dark stone, a sealer will keep the tone reading deeper for longer, but it will not bleach out the way some dyed products do.
Tell us the thickness, quantity and destination — we'll come back with USD/sqft pricing and confirmed lead times. No agents in between.
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Speak to our team for pricing, samples, MOQ details and shipping options to your country. Direct from India since 1996.
